﻿<p>The <em>IfcProtectiveDeviceTypeEnum</em> specifically defines the range of different breaker unit types that can be used in conjunction with protective device. Types may also be used as a reference to a complete protective device in circumstances where tripping units are not separately identified (typically expected to be the case during earlier stages of design). </p>

<blockquote class="history">HISTORY&nbsp; New type in IFC2x2. Modified definition and usage in IFC4. </blockquote>